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Fig. 4 | Research and Practice in Technology Enhanced Learning

Fig. 4

From: Managing lifelong learning records through blockchain

Fig. 4

Hierarchical view of BOLL system smart contracts. This figure shows the top-level design of the BOLL system’s smart contracts. The smart contracts control how institutions join the blockchain, how learning records are written, indexed, or accessed. The smart contracts also contain information on how permissions can be granted at various levels

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